21323043210432 has 112 divisors (see below), whose sum is σ = 60767628690560. Its totient is φ = 6576997367808.

The previous prime is 21323043210421. The next prime is 21323043210461. The reversal of 21323043210432 is 23401234032312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21323043210432.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67809793 + ... + 68123520.

Almost surely, 2^{21323043210432} is an apocalyptic number.

It is an amenable number.

21323043210432 is an abundant number, since it is smaller than the sum of its proper divisors (39444585480128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21323043210432 is a wasteful number, since it uses less digits than its factorization.

21323043210432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135933390 (or 135933380 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 30.

Adding to 21323043210432 its reverse (23401234032312), we get a palindrome (44724277242744).

The spelling of 21323043210432 in words is "twenty-one trillion, three hundred twenty-three billion, forty-three million, two hundred ten thousand, four hundred thirty-two".